diff --git a/Gemfile b/Gemfile
index fe048d0f5..6c98f7742 100644
--- a/Gemfile
+++ b/Gemfile
@@ -20,7 +20,7 @@ gem 'simple_form'
 
 # RDF stuff
 gem 'acts_as_rdfable', github: 'ualbertalib/acts_as_rdfable', tag: '0.4.0'
-gem 'rdf', '~> 3.2.9'
+gem 'rdf', '~> 3.3.1'
 gem 'rdf-n3', '~> 3.2.1'
 gem 'rdf-vocab', '~> 3.2.3' # this gem changed predicate names without warning, be cautious and test with migrations
 
diff --git a/Gemfile.lock b/Gemfile.lock
index ea62b9b16..2a3994044 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -114,6 +114,7 @@ GEM
     amazing_print (1.4.0)
     ast (2.4.2)
     base64 (0.1.1)
+    bcp47_spec (0.2.1)
     bcrypt (3.1.19)
     better_errors (2.10.1)
       erubi (>= 1.0.0)
@@ -446,7 +447,8 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rchardet (1.8.0)
-    rdf (3.2.9)
+    rdf (3.3.1)
+      bcp47_spec (~> 0.2)
       link_header (~> 0.0, >= 0.0.8)
     rdf-aggregate-repo (3.2.0)
       rdf (~> 3.2)
@@ -674,7 +676,7 @@ DEPENDENCIES
   pundit (= 1.1.0)
   rails (~> 6.1.7)
   ransack (= 4.0.0)
-  rdf (~> 3.2.9)
+  rdf (~> 3.3.1)
   rdf-isomorphic (~> 3.2.1)
   rdf-n3 (~> 3.2.1)
   rdf-vocab (~> 3.2.3)